[BreitbartSentMe]

Here's a couple more:

Bring an outlet strip, because there are never enough outlets in the cabins.

If you have a balcony, a long bungee cord to hold the door open lets you hear the wonderful ocean sounds for the few hours you're in your cabin.

[Johnny_Cipher]

Great ideas, both of them! There's a multistrip in my laptop case, so I didn't think of that one because its with me (at least when my laptop is).